TWI570012B - Bicycle seat height adjustment mechanism - Google Patents

Description

Bicycle seat tube height adjustment mechanism

The invention relates to a bicycle seat tube height adjusting mechanism, in particular to a mechanism with convenient assembly and maintenance, simplified components and easy processing, and novel structure.

According to the conventional bicycle seat tube height adjusting mechanism, it is generally composed of an inner tube, an outer tube, a lifting adjustment unit and a lifting control unit. Wherein, one end of the inner and outer tubes are inserted into each other. The lifting adjustment unit is located in the inner and outer tubes, and one end is fixed to the outer tube, and the other end is fixed to the inner tube for driving the inner tube to rise or fall. The lifting control unit is operated by a user to control the movement or stop of the lifting adjustment unit. For example, the Taiwan Patent Application No.: 104205140, 099137166, etc. (hereinafter referred to as the conventional case) are used for the height adjustment of the bicycle seat tube. The seat tube height adjusting mechanism of the conventional case is located in the oil path of the lifting and adjusting unit in the tube, and has a space applied to the inner and outer tubes. Therefore, the following drawbacks exist in the application of the conventional case:

1. Inconvenience in assembly and maintenance of components. Since the oil circuit exchange of the lifting and adjusting unit is applied to the inner space of the inner and outer tubes, when the components are replaced, the internal components of the whole seat tube need to be disassembled, resulting in inconvenient maintenance and inconvenience in assembly. .

2. The oil path ring for oil retaining is easy to break or wear. In the conventional case, the hollow oil ring is sleeved outside the shaft, and the outer wall of the oil ring is in contact with the inner wall of the tube to block the oil, and the first oil chamber separated by the oil ring is prevented from flowing to the second oil chamber. However, when the height of the seat cushion is lowered, the moment when the person sits on the seat cushion, there is a great momentary pressure on the seat tube, and the oil ring is subjected to the shear stress of the depression, which is easy to cause breakage; or the outer wall and the tube of the oil ring Long-term shear-stress friction between the inner walls can easily lead to thinning of the thickness and degeneration of the oil.

3. The oil path of the conventional case is applied to the inner space of the inner and outer tubes, so the needle of the push-pull oil valve needs to be lengthened, which causes the cost of the striker to be high. Moreover, there are many parts in the conventional case, and the standard error accumulated by each part is large. As a result, the precision required for each part is high, which results in high processing cost of parts.

The present inventors have improved the present invention in view of the fact that the above-mentioned examples have the above-mentioned deletions in the application.

Accordingly, the main object of the present invention is to provide a bicycle seat tube height adjusting mechanism that is easy to assemble and maintain, has simplified parts, is easy to process, and has a novel structure.

The main feature of the present invention is that the oil passage exchange of the bicycle seat tube height adjusting mechanism is located in the lifting and lowering adjustment unit, and the oil passage exchanged valve port and the oil retaining plate are joined by the above-mentioned lower bonding manner. Therefore, it is only necessary to replace the lifting and adjusting unit during maintenance, which has the advantages of convenient maintenance and assembly. Moreover, the valve port and the oil baffle are disposed in a relationship between the upper and lower surfaces, and the oil retaining effect is good, and the oil baffle does not bear the conventional scissors when the person sits on the seat cushion. Stress, so the service life is increased.

Regarding the technical means and the structure of the present invention for achieving the above object and effect, the following embodiments will be described below with reference to the drawings.

Referring to the first to third figures, the bicycle seat tube height adjusting mechanism 1 of the embodiment of the present invention includes an outer tube 10, an inner tube 20, a lifting adjustment unit 30, and a lifting control unit 40. among them,

The outer tube 10 has a bottom end that penetrates into the riser of a bicycle frame and is fixed to the riser. The inner wall of the bottom end has a joint tooth surface 11, and the top end outer wall is connected with a head portion 12.

The inner tube 20 has a bottom end penetrating into the inner portion of the outer tube 10 from the top end of the outer tube 10, and a fixing seat 21 is disposed at the top end for fixing a mat for the rider to ride.

The lift adjustment unit 30 is disposed inside the inner and outer tubes 20 and 10 after being joined. The first tube 31 and a second tube 32 disposed in the tube of the first tube 31 are included. The second tube 32 has a shorter length than the first tube 31. The top nozzles of the first and second tubes 31 and 32 are coupled by an upper joint 33. The bottom end of the first tube 31 is fixed with a lower joint 34. The upper and lower joints 33 and 34 respectively The top tube and the bottom end of the first tube 31 are sealed, and the outer wall of the lower joint 34 is provided with a fixing tooth surface 341, and the combined tooth surface 341 and the outer tube 10 of the outer tube 10 are screwed. Fixed. The upper and lower coupling seats 33 and 34 respectively have an upper opening 330 and a lower opening 340. The bottom end of the second tube 32 is fixed with a valve seat 35. The valve seat 35 seals the bottom end of the second tube 32. The valve seat 35 has an axially disposed plurality of valve ports 350 in an eccentric position. The center of the valve seat 35 has a central opening 351 disposed axially. The lift adjustment unit 30 further includes a shaft rod 36 and a striker 37. The bottom end of the shaft rod 36 is fixed with a piston 360, and is located in the second tube 32. The outer wall and the second portion of the piston 360 The inner wall of the tube 32 is in contact. The top end of the shaft rod 36 passes through the upper opening port 330 and is located in the inner tube 20, and the top end of the shaft rod 36 is fixedly connected with a connecting seat 361 and fixed to the fixing seat 21, and the shaft rod 36 is fixed. It can be axially displaced together with the inner tube 20. The top end of the striker 37 passes through the center opening 351 of the valve seat 35 and is fixed to the outside with an oil retaining plate 370. The oil retaining plate 370 is positioned above the valve seat 35 and is disposed above and below the valve port 350. It is glued and fixed by a metal plate 370a and a rubber plate 370b (as shown in the fourth and sixth figures), and the rubber plate 370b faces the valve port 350. The outer diameter of the oil baffle 370 is beyond the position of the valve port 350, and the valve port 350 can be blocked; the striker 37 is pushed up by an elastic body 371 disposed in the valve seat 35. The oil baffle 370 has a force that constantly blocks the valve port 350. The bottom end of the striker 37 is provided with a top collision surface 372 passing through the lower opening 340 of the lower joint 34 to the lower side of the lower joint 34. The striker 37 is located in the middle of the first tube 31, and the outer sleeve is provided with a floating piston 373 which is axially displaced on the striker 37 after being pushed up. The outer wall of the floating piston 373 and the tube of the first tube 31 The inner wall is connected. The inside of the second tube 32 is located between the piston 360 and the upper coupling seat 33 and is separated by a first oil chamber 374 filled with oil; the piston 360 and the valve seat 35 are separated by an internal filling oil. a second oil chamber 375; the first tube 31 is located between the valve seat 35 and the floating piston 373 and the outer wall of the second tube 32, and is separated by a filling fluid. A third oil chamber 376 is located in the first tube 31 between the floating piston 373 and the lower joint 34, and is separated by an air chamber 377 having air inside. The top end outer wall of the second tube 32 is provided with a plurality of oil passage holes 320 through which the oil in the third oil chamber 376 is squeezed, and can flow into the first oil chamber 374 through the oil passage holes 320.

The lifting control unit 40 is disposed under the impact surface 372 of the striker 37 and has a control arm 41. One end of the control arm 41 has a shaft hole 42 for allowing a pivot 43 to pass through. The pivot 43 is pivotally connected to a fixing hole 342 located at an eccentric position of the lower joint 34. The shaft hole 42 of the control arm 41 is pivotally connected to the lower joint 34. The control arm 41 is disposed at an opposite end of the shaft hole 42 and has a slot 44. The slot of the slot 44 is opposite to the top surface 372. The center of the slot 44 has a line hole 440 corresponding to the position of the line hole 440. The outer wall of the lower joint 34 is recessed with a threaded hole 343. The slot 44 is embedded in the end of the plastic protection tube 51 disposed outside the control line 50. After the line hole 440 is available for one end of the control line 50, the control line 52 disposed at the end of the control line 50 is The wire is fixed in the wire hole 343. The control arm 41 faces the top surface 372 side and has a top block 45 corresponding to the position of the impact surface 372. When the person controls the control line 50 at the handle position of the bicycle, the control arm 41 can be driven with the pivot 43 as the axis and biased toward the end of the striker 37, so that the top block 45 pushes the top surface 372 upward, so that the striker 37 is synchronized. The axial displacement is upward, thereby causing the oil deflector 370 to exit the valve port 350.

When the above-mentioned components are combined, as shown in the first and third figures, when applied, the lifting and lowering adjustment unit 30 and the lifting and lowering control unit 40 are combined, and can also be used upside down and inverted in the inner and outer tubes 20 and 10. It is not limited to the application methods of the first and third figures. When operating:

1. When the height of the seat cushion is to be raised, the user pivots one end of the control line 50 at the handle end of the bicycle, and the end of the opposite end of the control tube 50 drives the control arm 41 to pivot with the pivot 43 as an axis. The top block 45 pushes the top surface 372 and the striker 37 to move axially upward, so that the oil deflector 370 leaves the valve port 350, causing the second and third oil chambers 375, 376 to communicate. At this time, the user does not press down on the seat cushion, and the accumulated gas pressure in the air chamber 377 pushes the floating piston 373 upward, so that the floating piston 373 is axially moved upward to push the oil in the third oil chamber 376. The liquid reversely flows through the valve port 350 into the second oil chamber 375. After the oil flows into the second oil chamber 375, the oil pushes the piston 360, the shaft rod 36 and the inner tube 20 upward, and is located at the same time. The oil in the first oil chamber 374 is pushed upward by the piston 360, and enters the third oil chamber 376 through the oil passage hole 320, thereby raising the height of the seat cushion as shown in the fourth figure. When the height of the seat cushion rises to the predetermined height, the release control line 50 causes the end portion of the protective tube 51 to no longer push the top block 45 of the control arm 41 to push the striker 37, and the striker 37 is reset to make the valve port The 350 recovery is blocked by the oil retaining plate 370, and the flow of the oil is restricted. At this time, the position where the seat cushion is adjusted upward is fixed, as shown in the fifth figure.

When the height of the seat cushion is to be lowered, the user pivots one end of the control line 50 at the end of the bicycle handle, and the opposite end of the control line 50 drives the control arm 41 to pivot with the pivot 43 as the axis. The block 45 pushes the top surface 372 and the striker 37 to move axially upward, so that the oil deflector 370 leaves the valve port 350, causing the second and third oil chambers 375, 376 to communicate, as shown in the sixth figure. At this time, the user applies a force on the seat cushion to axially press the shaft rod 36 and the inner tube 20 downward. As shown in the seventh figure, the oil in the original second oil chamber 375 is pressed by the piston 360. It flows through the valve port 350 to the third oil chamber 376. When the axial rod 36 and the piston 360 continue to be depressed, the oil in the second oil chamber 375 can be pushed into the first oil chamber 374 through the oil passage hole 320, but the shaft rod 36 is extended. The second tube 32 occupies the inner space of the first oil chamber 374. The first oil chamber 374 and the second oil chamber 375 cannot completely accommodate the oil, and the accumulated pressure of the oil flowing into the third oil chamber 376 is squeezed. The floating piston 373 is displaced downward to compress the gas in the gas chamber 377. If the gas accumulated in the gas chamber 377 is compressed, the gas pressure is equal to the oil pressure in the third oil chamber 376. And the inner tube 20 can no longer be moved down, which is the lower limit of the seat cushion down adjustment. When the user adjusts the falling height of the seat cushion to the predetermined position, the control line 50 is released, the striker 37 and the oil retaining plate 370 are immediately returned to the original position by the restoring force of the elastic body 371, so that the oil retaining plate 370 resumes blocking the valve. The mouth 350, in this way, the oil of the second and third oil chambers 375, 376 is no longer circulated, and the height position of the seat cushion can be adjusted to be lowered, as shown in the eighth figure.

The oils of the present invention are all disposed in the lifting and lowering adjustment unit 30. The lifting and lowering adjustment unit 30 can be regarded as a closed type. Therefore, if the components are replaced or assembled, only the entire lifting and adjusting unit 30 can be replaced. Repair and assembly is very convenient.

The clogging oil flow mode between the oil slab 370 and the valve port 350 of the lifting and lowering adjustment unit 30 is blocked by the above-mentioned lower sealing method, and the oil slinger 370 does not bear the height of the adjusting seat cushion, and the person sits on the seat cushion instantaneously. The shear stress generated by the pressing is lowered, and therefore, the life of the oil retaining plate 370 is long.

The above structure is not only novel and has few components, and the processing and forming are more labor-saving, and the cost can be reduced.

Looking at the above, the present invention is not only novel and effective, but also submits an invention patent application according to law, and requests for review and approval of the patent.

1‧‧‧Seat tube height adjustment mechanism 10‧‧‧External tube 20‧‧‧Inner tube 30‧‧‧Lift adjustment unit 40‧‧‧Lower control unit 11‧‧‧ Combined tooth surface 12‧‧‧ Head 21‧ ‧ ‧ fixed seat 31‧ ‧ first tube 32 ‧ ‧ second tube 33 ‧ ‧ upper joint 34 ‧ ‧ lower joint 330 ‧ ‧ upper opening 340 ‧ ‧ lower opening 341 ‧ ‧ Fixed tooth surface 35‧‧‧Valve 350‧‧‧Valve mouth 351‧‧‧Center mouth 36‧‧‧Axis rod 37‧‧‧Scill needle 360‧‧‧Piston 361‧‧‧Connector 370‧‧ Oil plate 370a‧‧‧Metal plate 370b‧‧‧Rubber plate 371‧‧‧Sexual body 372‧‧‧Top surface 373‧‧‧Floating piston 374‧‧‧First oil chamber 375‧‧ Second oil chamber 376‧ ‧‧The third oil chamber 377‧‧‧Air chamber 320‧‧‧Oil through hole 41‧‧‧Control arm 42‧‧‧Axis hole 43‧‧‧Pivot 342‧‧‧Fixed hole 44‧‧‧Inlay 4 0‧‧‧ line holes 343‧‧‧ thread hole 50‧‧‧ control line 51‧‧‧ protective tube 52‧‧‧ top block control thread 45‧‧‧

The first figure is a perspective view of an embodiment of the present invention; the second figure is an exploded view of the embodiment of the present invention; the third figure is a combined sectional view of the embodiment of the present invention; The operation diagram of the embodiment of the invention mainly explains how to adjust the height and position of the seat tube and the fixing.

1‧‧‧Seat tube height adjustment mechanism

10‧‧‧External management

20‧‧‧Inside

30‧‧‧ Lifting adjustment unit

40‧‧‧ Lifting control unit

11‧‧‧ combined with tooth surface

12‧‧‧ head

21‧‧‧ Fixed seat

31‧‧‧ first tube

32‧‧‧Second tube

33‧‧‧上上座

34‧‧‧Under the seat

330‧‧‧Upper mouth

340‧‧‧ Under the mouth

341‧‧‧Fixed tooth surface

35‧‧‧ valve seat

350‧‧‧ valve port

351‧‧‧ center port

36‧‧‧Axis rod

37‧‧‧Scill

360‧‧‧Piston

361‧‧‧Connecting seat

370‧‧‧ oil plate

371‧‧‧ Elastomers

372‧‧‧Top surface

373‧‧‧Floating piston

374‧‧‧First Oil Room

375‧‧‧Second oil room

376‧‧‧ third oil room

377‧‧‧ air chamber

320‧‧‧ oil through hole

41‧‧‧Control arm

42‧‧‧Axis hole

43‧‧‧ pivot

342‧‧‧Fixed holes

44‧‧‧Inlay

440‧‧‧Line hole

343‧‧‧ thread hole

50‧‧‧Control line

51‧‧‧Shield

52‧‧‧Control line head

45‧‧‧Top block

Claims (5)

A bicycle seat tube height adjusting mechanism comprises an outer tube, an inner tube, a lifting adjustment unit, and a lifting control unit; wherein the bottom end of the inner tube is inserted into the outer tube from the top end of the outer tube The lifting and adjusting unit is disposed inside the inner and outer tubes; the lifting and lowering control unit is configured to control the lifting and adjusting unit to actuate or stop; and the lifting and adjusting unit comprises a first a tube and a second tube disposed in the first tube, the top nozzles of the first and second tubes are coupled by an upper joint, and the bottom end of the first tube is fixed a lower joint, the upper and lower joints respectively seal the top and bottom end of the first tube, and the outer wall of the lower joint is fixed to the inner wall of the bottom end of the outer tube; The middle of the lower joint has an upper opening and a lower opening respectively; the bottom end of the second tube is fixed with a valve seat, and the valve seat seals the bottom end of the second tube, and the valve seat has an eccentric position A plurality of valve ports arranged axially, the center of the valve seat has an axial arrangement a center opening; the lifting and adjusting unit further includes a shaft rod and a striker, the bottom end of the shaft rod is fixed with a piston, and is located in the second tube, the outer wall of the piston and the second tube The inner wall is in contact with the inner tube; the top end of the shaft rod is located in the inner tube; the top end of the shaft rod is fixed with a connecting seat fixed to the inner tube, and the shaft rod and the inner tube The axial direction of the striker is passed through the central opening of the valve seat, and an oil retaining plate is fixed on the outer side, and the oil deflector is located above the valve seat, and is arranged above and below the valve port. Relationship, the outer diameter of the oil baffle is beyond the valve port setting position, and the valve port can be blocked; the striker is pushed up by an elastic body disposed in the valve seat, and the oil baffle is pushed Having a force blocking the valve port; the bottom end of the striker has a top collision surface passing through the lower opening to the lower joint; the striker is located in the middle of the first tube, and the outer sleeve is covered by the top Pushing a floating piston axially displaceable on the striker, the outer wall of the floating piston and the inner tube of the first tube Contacting; the inside of the second tube is located between the piston and the upper coupling seat with a first oil chamber filled with oil; the internal filling oil is located between the piston and the valve seat a second oil chamber of the liquid; the first tube is located inside the valve seat a space formed between the floating piston and the outer wall of the second pipe is separated by a third oil chamber filled with oil; inside the first pipe between the floating piston and the lower joint, The system is separated by a gas chamber having air inside; the outer wall of the top end of the second tube is provided with a plurality of oil passage holes, and when the oil in the third oil chamber is squeezed, the first oil can flow into the oil through the oil passage hole. indoor. The bicycle seat tube height adjusting mechanism according to claim 1, wherein the lifting control unit is disposed below the top surface and has a control arm, and one end of the control arm has a shaft hole, and the shaft hole has a shaft hole After a pivot is passed through, the pivot is pivotally connected to a fixing hole located at an eccentric position of the lower joint; the control arm is provided with a groove at an opposite end of the shaft hole, and the insert has a groove a notch, the notch is facing away from the top surface; the center of the groove has a line hole, and the outer wall of the lower joint corresponding to the position of the hole is recessed with a threaded hole; the above-mentioned groove is available a protective tube end portion disposed outside the control line is embedded, and the line hole is allowed to pass through one end of the control line, and the control line head disposed at the end of the control line is embedded in the line head hole and fixed; the control arm Facing the top surface of the top surface, a top block is protruded from the top surface of the top surface; and the control line is controlled, the control arm can be driven with the pivot axis as an axis biased toward the striker end, so that the top block pushes the top block The top collision surface is upward, so that the striker is axially displaced upward, thereby making the The oil baffle leaves the valve port. The bicycle seat tube height adjusting mechanism according to claim 1 or 2, wherein the oil retaining plate is glued and fixed by a metal plate and a rubber plate, and the rubber plate is disposed at a position facing the valve port. The bicycle seat tube height adjusting mechanism according to claim 3, wherein the inner tube is provided with a fixing base at the top end, and the fixing seat is used for fixing a mat. The bicycle seat tube height adjusting mechanism according to claim 4, wherein the bottom end inner wall of the outer tube has a combined tooth surface, and the outer wall of the lower joint seat is provided with a fixing tooth surface for fixing the tooth surface The upper surface of the lower joint is screwed to the inner surface of the bottom end of the outer tube.